# SDR AALA202401090977

- Type: Service difficulty report (as reported; unverified)
- Difficulty date: January 6, 2024
- Submitted: January 9, 2024
- Operation: Air carrier
- Aircraft: [N804NN](https://openairdocs.org/aircraft/N804NN), registered now
- Make and model: Boeing 737823
- Aircraft serial: 29567
- Aircraft time: 453,169 hours, 17,881 cycles
- System (JASC): [3400 · Navigation System](https://openairdocs.org/jasc/3400)
- Part: Antenna
- Part number: UNKNOWN
- Condition: Faulty
- Location: Zone 100 - Fuse
- Stage of operation: DE
- How discovered: O
- Nature of condition: G
- Precautionary procedure: A
- FAA source: FAA Service Difficulty Reporting System (https://sdrs.faa.gov/)
- Page: https://openairdocs.org/sdr/AALA202401090977

## Discrepancy

AIRCRAFT WAS GROUNDED: AN EMERGENCY WAS DECLARED DUE TO: FLIGHT DIRECTOR DISAPPEARED ON APPROACH AGAIN. AIRCRAFT DIVERTED AND LANDED SAFELY AT IAD WITHOUT FURTHER INCIDENT. FOUND FAULT MSG 22-11051. ACCOMPLISHED FIM 22-11-00. REMOVED AND REPLACED NUMBER 1 FORWARD ANTENNA (AALA202401090977), NUMBER 1 AFT ANTENNA (AALA202401098436), NUMBER 2 FORWARD ANTENNA (AALA202401096029), AND NUMBER 2 AFT RADAR ANTENNAS (AALA202401090549). ALL BITE TEST PASSED INCLUDING DFCS BITE TEST.

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